HS 39.13 — Natural polymers (e.g. alginic acid) and modified natural polymers (e.g. hardened proteins, chemical derivatives of natural rubber), n.e.c. or included, in primary forms

39.13.10

Polymers, natural; alginic acid, its salts and esters, in primary forms

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39.13.90

Polymers, natural and modified natural; in primary forms (excluding alginic acid, its salts and esters)

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